【第2回舗装工学講演会講演論文集 1997年12月】

舗装工学論文集 Vol. 2, 81-88, 1997.12

STRUCTURAL EVALUATION FOR AIRPORT ASPHALT PAVEMENTS WITH EARTHQUAKE INDUCED CRACKS

Jianjun YIN¹, Yoshitaka HACHIYA² and Takeshi NAKAMURA³

¹Dr. Eng., Guest Researcher, Runways Laboratory, Port and Harbor Research Institute, Ministry of Transport (1-1, Nagase 3, Yokosuka 239, Japan); Lecturer, Department of Highway, Xian Highway University, P. R. China
²Member of JSCE, Dr. Eng., Chief, Runways Laboratory, Port and Harbor Research Institute, Ministry of Transport
³Runways Laboratory, Port and Harbor Research Institute, Ministry of Transport

Two aspects were included in this paper: (1) evaluating the seriousness of earthquake induced cracks; (2) identifying the effectiveness of maintenance and rehabilitation (M&R). Firstly, through a theoretical analysis of elastic three-layer pavement model, pavement deflections D45 as well as D250 under FWD loading conditions at cracked and uncracked sections were recommended as indices to evaluate the seriousness of cracks. By means of statistical test, the structural evaluation procedure was proposed. Its validity was verified by coring tests. Then, by comparing the FWD deflections before and after M&R, the effectiveness of sealing, patching and overlay was identified.

Key Words: structural evaluation, asphalt pavement, FWD, crack, M&R, airport, earthquake

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本論文では，(1)地震により生じたひび割れのひどさの評価，(2)ひび割れ部の 維持補修方法の有効性の評価の2点について論じている．まず，前者については， 舗装を3層弾性モデルとして理論解析した結果，ひび割れ部と非ひび割れ部で測定 したFWDたわみ（D45とD250）に注目することにより実行可能であることがわかった ので，統計的手法を採用したうえで，D45とD250に基づく方法を提案している．こ の方法の有効性は現地から採取されたコアによっても確認された．後者について は，数種類の維持補修工法の実施前後で測定されたFWDたわみを比較することによ り，シーリング，パッチング，オーバーレイといった補修方法の有効性について明 らかにしている．

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